我们常常举出这样一系列形状不同,然而具有相同光焦度的透镜,作为透镜的配曲调整的例子.One often speaks of this succession of shapes having the same power as exemplifying lens bending.用同样的方法,我们能够求出任意数目的薄透镜的响应.In this same way we could compute the response of any nu...
Blacksmiths spent most of their time repairing tools and shoeing horses...铁匠大部分时间都在修理工具和钉马掌。The streets were strangely quiet, with only a monotonous, aggravating clanging sounding from the blacksmiths'forges.街上异常的清静...
She has danced, choreographed, lectured and taught all over the world.她在世界各地跳过舞、编过舞、讲过学、也教过书。There was some carefully choreographed flag-waving as the President drove by.总统的车经过时，人们按精心编排的动作挥舞着旗帜。Achim had choreographed th...
stanza（诗节）的原意为“房间”。A stanza is, literally, a room.今天我在学校里学了诗的三个诗节.Today I learned three verses of a poem at school.每首诗有四个诗节.There are four verses in each poem....
The blood drained from his face, leaving the skin dead white.他的脸失去了血色，变得一片死灰。As his energy drained away, his despair and worry grew.当他的精力耗尽时，他的绝望和担心也增加了。The water slowly drained away, down through the porous soil.水慢慢流走了，...